Solar-ground source heat pump coupled energy supply system and operating method thereof

Abstract

The invention relates to a solar-ground source heat pump coupled energy supply system and an operating method thereof. A large unit, a small unit and solar hot water are adopted to supply heat to a building, the two units are interconnected and intercommunicated at the tail end and ground source side of the building, the heat is supplied to the building under various modes by using two ground source heat pump systems and the solar hot water according to an actual thermal load requirement, the operation mode of the system is optimized under the condition of ensuring that the soil temperatures of the ground source heat pumps are balanced, and efficient operation for cooling in summer and heating in winter is realized. When bearing an extremely low heat supply load within a relatively long period of time, the heat supply requirement of the building is met through supplying heat by solar-assisted ground source heat pumps and directly supplying heat by solar energy; and when bearing a normal heat supply load, the heat supply requirement of the building is met by using a pure ground source heat pump unit.

Description

technical field [0001] The invention belongs to the technical field of building heating, cooling and hot water supply, and specifically relates to a solar energy-ground source heat pump coupled energy supply system and an operating method thereof. Background technique [0002] With the improvement of people's living standards, people's requirements for the comfort of buildings are getting higher and higher. The resulting building energy supply problem is becoming more and more serious. my country's primary energy consumption accounts for about 20% of the world's total, equivalent to about 3.62 billion tons of standard coal, and energy consumption per unit of GDP remains high. At present, my country's building energy consumption accounts for about 27% of the total energy consumption of the whole society, of which heating and cooling energy consumption accounts for about 60% of the entire building energy consumption. Therefore, reducing the heating and air conditioning energy...

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Problems solved by technology

[0004] Ordinary solar ground source heat pump systems are usually in the form of a single buried pipe group or a hot water storage tank as the heat source for the evaporator of the unit. The long-term operation of the system will easily cause the ground temperature to rise or fall, which will affect the energy efficiency of the operation. Therefore, a set of buried pipes It is difficult for the group and unit system to meet the comprehensive energy supply demand at the same time

There are also two independent buried pipe groups with two heat pump units for dual-system heating mode (ZL201110146044.1). Although the problem of unbalanced heating is solved, the system uses two units to provide heat separately. The operating load deviates greatly from the rated load, and the energy efficiency of the unit is affected

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